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Johnathan Corgan
ec64a0dce1
Implement TCP transport for FIPS enabling firewall traversal and serving as the foundation for future Tor transport. This is the first connection-oriented transport in the system. Key design decisions: - FMP header-based framing: reuses existing 4-byte FMP common prefix for packet boundary recovery with zero framing overhead - Session survives TCP reconnection: Noise/MMP/FSP state bound to npub, not TCP connection; MMP liveness is sole authority for peer death - Connect-on-send: fresh connection on first send, transparent reconnect - close_connection() trait method for cross-connection deduplication cleanup New transport files: - src/transport/tcp/mod.rs: TcpTransport, connection pool, accept loop - src/transport/tcp/stream.rs: FMP-aware stream reader (shared with Tor) Modified: transport trait (close_connection), TcpConfig, TransportHandle match arms, create_transports(), initiate_connection() for connection- oriented links, cross-connection tie-breaker cleanup, design docs. Tree announce loop and TCP stability fixes: - Preserve tree announce rate-limit state across reconnection: carry forward last_tree_announce_sent_ms when a peer reconnects so the rate-limit window isn't reset to zero - Drop oversize TCP packets at sender: pre-send MTU check returns MtuExceeded instead of writing to the stream, preventing receiver-side connection teardown and reset-reconnect cycles Chaos harness: - TCP transport support: tcp_edges/has_tcp/tcp_peers in SimTopology, transport-aware config_gen with per-edge transport type, TCP port 443, pure-TCP node support - Include all non-Ethernet edges in directed_outbound() - Fix netem/links log messages to say "IP-based" instead of "UDP" - Add tcp-chain, tcp-only, and tcp-mesh scenario files Static harness: - Transport-aware config generation (get_default_transport, transport_port) - TCP transport injection via Python post-processing - Add tcp-chain topology and docker-compose profile
41 lines
673 B
YAML
41 lines
673 B
YAML
# TCP chain: 4-node linear topology, all TCP transport
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#
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# Tests basic TCP transport connectivity, spanning tree convergence,
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# and multi-hop routing over TCP links.
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#
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# Topology:
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#
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# n01 ---tcp--- n02 ---tcp--- n03 ---tcp--- n04
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scenario:
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name: "tcp-chain"
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seed: 42
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duration_secs: 90
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topology:
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algorithm: explicit
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num_nodes: 4
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default_transport: tcp
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params:
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adjacency:
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- [n01, n02]
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- [n02, n03]
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- [n03, n04]
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netem:
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enabled: true
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default_policy:
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delay_ms: [1, 5]
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jitter_ms: [0, 1]
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loss_pct: [0, 0.5]
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link_flaps:
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enabled: false
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traffic:
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enabled: false
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logging:
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rust_log: "info"
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output_dir: "./sim-results"
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